Persistency of Genuine Correlations Under Particle Loss

TL;DR

This paper investigates how genuine multipartite quantum correlations, such as entanglement and nonlocality, persist when particles are lost, emphasizing states with maximal persistency for practical quantum information applications.

Contribution

It introduces the study of the persistency of genuine multipartite correlations under particle loss and identifies states with maximal such persistency.

Findings

Genuine correlations can be robust against particle loss.

Certain multipartite states exhibit maximal persistency of genuine correlations.

The study highlights the importance of these states for quantum information tasks.

Abstract

In a recent work [\href{http://journals.aps.org/pra/abstract/10.1103/PhysRevA.86.042113}{Phys. Rev. A 86, 042113 (2012)}] the question of persistency of entanglement and nonlocality of multi-party systems under particle loss has been addressed. This question is of immense importance considering the practical realization of the information theoretic tasks which make use of the power of quantum correlations. But in multipartite scenario more interesting cases arise since subsystems can also possess genuineness in correlation which is prevalently inequivalent to the bipartite scenario. In this work, we investigate the persistency of such genuine correlations under particle loss. Keeping in mind the practical importance, considerable attention has been devoted to find the multipartite states which exhibit maximal persistency of genuine correlations.